/Engine/Plugins/Protocols/MQTT/Source/MQTTCore/Public/MQTTClientObject.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(BlueprintType, Meta=(DisplayName="MQTT Subscription")) class UMQTTSubscriptionObject : public [UObject](API\Runtime\CoreUObject\UObject\UObject)
FOnMessageDeleg...
OnMessageDelegate